/*
 *   Copyright (C) 2008  The Concord Consortium, Inc.,
 *   25 Love Lane, Concord, MA 01742
 *
 *   This program is free software; you can redistribute it and/or modify
 *   it under the terms of the GNU General Public License as published by
 *   the Free Software Foundation; either version 2 of the License, or
 *   (at your option) any later version.
 *
 *   This program is distributed in the hope that it will be useful,
 *   but WITHOUT ANY WARRANTY; without even the implied warranty of
 *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 *   GNU General Public License for more details.
 *
 *   You should have received a copy of the GNU General Public License
 *   along with this program; if not, write to the Free Software
 *   Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
 *
 * END LICENSE */
package org.concord.mw3d.models;

import javax.vecmath.Point3f;

/**
 * @author Charles Xie
 * 
 */
public class Restraint {

	private float strength = 1;
	private Point3f position;
	private Atom atom;

	public Restraint(Atom atom) {
		if (atom == null)
			throw new IllegalArgumentException("Argument cannot be null.");
		atom.setRestraint(this);
		this.atom = atom;
		position = new Point3f(atom.rx, atom.ry, atom.rz);
	}

	public void setStrength(float strength) {
		this.strength = strength;
	}

	public float getStrength() {
		return strength;
	}

	public void setPosition(float x, float y, float z) {
		position.set(x, y, z);
	}

	public Point3f getPosition() {
		return position;
	}

	public String toString() {
		return "restraint " + atom.index + " " + strength + " " + XyzWriter.FORMAT.format(position.x) + " "
				+ XyzWriter.FORMAT.format(position.y) + " " + XyzWriter.FORMAT.format(position.z);
	}

}
